JP6996715B2 - Fixture of rod-shaped member and fixing structure using it - Google Patents

Description

The present invention relates to a fixative for fixing a rod-shaped member such as a handrail of a corridor and a fixing structure using the same.

Highway and railroad bridges are generally equipped with inspection paths for regular inspections and repairs of damaged parts. In many of the corridors that make up this inspection path, columns are erected at multiple locations in the longitudinal direction of the main girder, and handrails are attached to these columns.

For example, the corridor described in Patent Document 1 includes a main girder integrally formed with a deck, columns erected on both sides of the main girder at a plurality of locations in the longitudinal direction of the main girder, and a length of the main girder. The simple structure consisting of multiple handrails that can be attached to the columns while extending in the direction makes it easy to install.

In this corridor, a member having an L-shaped cross section composed of two strip-shaped portions is used as a support, and a round pipe-shaped member is used for the handrail. Then, the lower end of one strip of each strut is fastened to the side surface of the main girder with bolts and nuts, and the handrail is passed through the other strip of each strut. The front and back of the key points are fixed to the columns with fixing tools.

As the fixture for the handrail of the corridor as described above, the annular portion cut at one place in the circumferential direction, the mounting portion extending radially outward from the outer periphery of the annular portion, and the diameter from both sides of the cut portion of the annular portion. A pair of tightening portions extending outward in the direction are provided, and the annular portion is aligned with the peripheral edge of the handrail through hole of the column, and the mounting portion is attached to the column. It is known that the annular portion is reduced in diameter by tightening the portions close to each other with bolts and nuts, and the handrail is tightened at the annular portion to fix the handrail to the support column (see, for example, FIG. 2 of Patent Document 1). ..

Fixtures having such a configuration can be widely used not only when the handrail is fixed to the support of the corridor as described above, but also when the rod-shaped member is fixed to the fixing member.

Japanese Unexamined Patent Publication No. 2018-197458

By the way, since the above-mentioned fixative is generally made of a metal having a certain degree of rigidity, it takes some time and effort to reduce the diameter of the annular portion until the annular portion can securely tighten the rod-shaped member. There was room for improvement. In particular, when the number of fixing points increases due to fixing the handrail to the support column at the construction site of the corridor, it has been required to reduce the labor of the fixing work.

Therefore, it is an object of the present invention to improve the work efficiency when fixing the rod-shaped member to the fixing member by using a fixing tool having an annular portion through which the rod-shaped member is passed.

In order to solve the above-mentioned problems, the fixing tool for the rod-shaped member of the present invention includes an annular portion cut at one point in the circumferential direction, a mounting portion extending radially outward from the outer circumference of the annular portion, and the annular portion. A pair of tightening portions extending radially outward from both sides of the cut portion and a holding piece having both tightening portions facing each other with a gap and holding a fixed ready state urged in a direction close to each other. The mounting portions are attached to the external fixing member, and the holding pieces are removed after passing the external rod-shaped member through the annular portion in the fixing ready state, so that the two tightening portions are in close proximity to each other. The diameter of the annular portion is reduced, and the rod-shaped member is tightened by the annular portion to be fixed to the fixing member.

If the fixture having the above configuration is used, the diameter of the annular portion is automatically reduced and the rod-shaped member is tightened by simply passing the rod-shaped member through the annular portion and removing the holding piece in the fixing ready state. Compared with the case of using a fixative in which the attachment portion is tightened with bolts and nuts to reduce the diameter of the annular portion, the rod-shaped member can be fixed more efficiently.

The fixture may be configured such that the attachment portion is attached to the fixing member in the fixing ready state.

Here, the holding piece may be integrally formed with both the tightening portions in a state in which the holding pieces can be separated from the both tightening portions. In that case, it is preferable that at least both the tightening portions and the holding piece are made of resin.

Further, the fixture of the present invention is a support column in which the fixing member is erected in the corridor, and can be particularly effectively applied when the rod-shaped member is a handrail, and can contribute to the improvement of the workability of the corridor. .. This is because when the handrail of the corridor is fixed to the support, the number of fixing points is usually large.

The fixing structure of the rod-shaped member of the present invention is such that the rod-shaped member is fixed to the fixing member by using the fixing tool of the rod-shaped member having the above-described configuration.

According to the present invention, as described above, when the rod-shaped member is fixed to the fixing member, the attachment portion of the fixture is attached to the fixing member, and the rod-shaped member is passed through the annular portion of the fixture in the fixing ready state to be held. Just by removing, the annular part of the fixture is automatically reduced in diameter, and the rod-shaped member can be tightened and fixed at the annular part, so a fixture that reduces the diameter of the annular part with conventional bolts and nuts is used. Work efficiency can be improved as compared with the case of doing.

Side view of the corridor to which the fixed structure of the embodiment is applied Front view of the corridor in FIG. (A) is an external perspective view of the fixture used in the corridor of FIG. 1, (b) is a front view of (a), and (c) is a side view of (a). An exploded perspective view of the fixed structure of the embodiment in the corridor of FIG. (A) and (b) are front sectional views explaining the action of the fixative corresponding to FIG. 3 (b), respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a corridor to which the fixed structure of the rod-shaped member of the embodiment is applied. This corridor includes a main girder 1 integrally formed with a floor slab, columns 2 as fixing members erected on both sides of the main girder 1 at a plurality of locations in the longitudinal direction of the main girder 1, and the length of the main girder 1. It is composed of a handrail 3 as a plurality of rod-shaped members attached to the support column 2 in a state of extending in the direction, and the main girder 1, each support column 2, and each handrail 3 are each made of fiber reinforced plastic (FRP).

The main girder 1 has a hollow plate shape composed of a front surface portion 11, a back surface portion 12, and side surface portions 13 on both the left and right sides, and is located between the front surface portion 11 and the back surface portion 12 at a plurality of locations in the width direction inside the main girder 1. It is an integrally molded product having ribs 14 extending in the longitudinal direction, and columns 2 are fixed to both side surface portions 13 thereof.

Each of the columns 2 is a member having an L-shaped cross section composed of two strips 21 and 22, and the lower end of the outer surface of one of the strips 21 is in contact with the side surface 13 of the main girder 1. It is fastened to the main girder 1 by a fastening member 4 including bolts and nuts. The back surface portion 12 of the main girder 1 is provided with an opening (not shown) in the vicinity of the fastening portion between the side surface portion 13 of the main girder 1 and each strut 2, and the main strut 2 is main using this opening. It can be fastened to the girder 1.

Each handrail 3 is a round pipe-shaped member, and penetrates the other strip-shaped portion 22 (which is orthogonal to the side surface of the main girder 1) of the plurality of columns 2 arranged in the longitudinal direction of the main girder 1. Three stages (upper stage, middle stage, lower stage) are arranged in the vertical direction. Among them, the upper handrail 3 has a larger diameter than the middle and lower handrails 3 in order to secure the rigidity. Then, the handrail 3 of each stage is fixed to the support column 2 by the fixing tool 5 at the front and back of each support column 2 penetration position.

3 (a) to 3 (c) show the state before use of the fixative 5 of the embodiment used in this corridor. The fixture 5 has a cylindrical annular portion 51 cut at one point in the circumferential direction, a mounting portion 52 extending radially outward from the outer circumference of one axial end of the annular portion 51, and a cut portion of the annular portion 51. From a pair of tightening portions 53 extending radially outward from both sides of the above, and a holding piece 54 in which both tightening portions 53 face each other with a gap and hold a fixed ready state urged in a direction close to each other. The whole is integrally formed by FRP in a fixed ready state.

The inner diameter of the annular portion 51 is formed to be slightly larger than the outer diameter of the handrail 3 to be fixed, so that the handrail 3 can be easily passed through when the handrail 3 is fixed, which will be described later.

The mounting portion 52 is a rectangular flat plate-shaped portion formed so as to be orthogonal to the axial direction of the annular portion 51, and a mounting hole 52a for the support column 2 is formed in the central portion thereof.

Each of the pair of tightening portions 53 is a rectangular flat plate-shaped portion that extends parallel to the axial direction of the annular portion 51, and a fastening member 6 (FIG. 1 and FIG. 1 and) for preventing rattling after fixing the handrail 3 is located at the central portion thereof. (See FIG. 2) is provided with a mounting hole 53a for mounting).

The holding piece 54 is a substantially U-shaped member including two claw portions 54a connected to the tip of each tightening portion 53. The claw portion 54a is formed in a wedge shape that becomes thinner toward the connection end with the tightening portion 53 in a side view. As a result, only by applying a slight force in the thickness direction to the holding piece 54, the connection portion of the claw portion 54a with the tightening portion 53 is broken, the holding piece 54 is separated from the tightening portion 53, and the fixture 5 is used. It is possible to cancel the fixed preparation state of.

Next, a procedure for fixing the handrail 3 to the support column 2 by using the fixture 5 having the above configuration will be described with reference to FIGS. 4 and 5. In the fixing work of the handrail 3, first, as shown in FIG. 4, with respect to the other strip-shaped portion 22 of the support column 2 erected on the main girder 1 of the corridor, on the peripheral edges of the handrail through holes 22a on both front and rear sides thereof, respectively. The annular portion 51 of the fixture 5 in the fixing ready state (the holding piece 54 is not separated) is aligned, and the fixing tool through hole 22b formed above the handrail through hole 22a and the front and rear fixing tools 5 are attached. In the state where the mounting hole 52a of the portion 52 is combined, the bolt 71 passed through the through hole 22b for the fixing tool and the mounting hole 52a of both fixing tools 5, the nut 72 screwed to the bolt 71, and a plurality of washers The attachment portion 52 of each fixture 5 is attached to the support column 2 by the fastening member 7 (see FIGS. 1 and 2).

Subsequently, after passing the handrail 3 through the handrail through hole 22a of the support column 2 and the annular portion 51 of the front and rear fixing tools 5, the holding piece 54 is separated from the pair of tightening portions 53 of each fixing tool 5 and is in a fixing ready state. To cancel. At this time, in the fixing preparation state before the holding piece 54 is separated, the fixture 5 has a gap between the inner peripheral surface of the annular portion 51 and the outer peripheral surface of the handrail 3 as shown in FIG. 5A. , Both tightening portions 53 are held in a state of being urged by the holding piece 54 in a direction close to each other, but when the holding piece 54 is separated and the fixing ready state is released, as shown in FIG. 5 (b). , Both tightening portions 53 are close to each other, the diameter of the annular portion 51 is reduced, and the handrail 3 is tightened by the annular portion 51.

When adjusting the position of the handrail 3 after separating the holding piece 54, insert the two claws 54a of the holding piece 54 between the two tightening portions 53 in a posture of arranging them in the axial direction of the annular portion 51. The diameter of the annular portion 51 may be increased to loosen the tightening of the handrail 3.

Finally, as shown in FIG. 4, a bolt 61 of the fastening member 6 is passed through a mounting hole 53a of both tightening portions 53 of each fixture 5, and a nut 62 and a plurality of washers screwed to the bolt 61 are used. The state in which both the tightening portions 53 are close to each other (the state in which the annular portion 51 tightens the handrail 3) is maintained so that the handrail 3 does not rattle due to an external force.

In this fixing structure, as described above, after the mounting portion 52 of the fixing tool 5 in the fixing ready state is attached to the support column 2 and the handrail 3 is passed through the annular portion 51, the holding piece 54 of the fixing tool 5 is simply removed. Then, the annular portion 51 of the fixture 5 is automatically reduced in diameter to tighten the handrail 3, and the handrail 3 can be fixed to the support column 2. After that, the fastening member 6 may be attached to both the fastening portions 53 of the fixing tool 5 so that the fastening portions 53 do not separate from each other, and it is not necessary to reduce the diameter of the annular portion at the time of attachment as in the conventional case. Therefore, the work of fixing the handrail 3 can be performed more efficiently than before, which in turn can contribute to the improvement of the workability of the corridor.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

For example, the fixture may be such that the pair of tightening portions are close to each other by removing the holding piece, and the annular portion is reduced in diameter to tighten the rod-shaped member. In addition to the one that is integrally formed and separates the holding piece at the time of use, the one that forms the holding piece separately from other parts and engages with both tightening parts and releases the engagement at the time of use. You can also.

If the holding piece is to be separated at the time of use, at least both tightening portions are integrally formed of the entire fixture with resin (including FRP) as in the embodiment so that the holding piece can be easily separated. It is desirable that the holding piece is made of resin, but the whole can be made of a material other than resin such as metal.

Further, in the embodiment, the fixing tool is attached to the support column in the fixing ready state (before separating the holding piece), but the holding piece is separated from the fixing tool before the fixing work, and when the fixing work is performed. After attaching the fixture to the column, the holding piece may be engaged with both tightening portions to prepare for fixing.

Further, the present invention is not limited to the fixing tool and fixing structure for fixing the handrail of the corridor to the support as in the embodiment, but also the fixing tool and fixing structure for fixing the rod-shaped member to the fixing member, for example, a shielding material (adjacent). It can be widely used for things used at assembly sites (for isolation from roads and buildings).

1 Main girder 2 Strut 3 Handrail 4, 6, 7 Fastener 5 Fixture 21, 22 Band-shaped part 51 Circular part 52 Mounting part 53 Tightening part 54 Holding piece

Claims (6)

An annular portion cut at one point in the circumferential direction, a mounting portion extending radially outward from the outer circumference of the annular portion, a pair of tightening portions extending radially outward from both sides of the cut portion of the annular portion, and the above. Both tightening portions face each other with a gap, and are provided with a holding piece that holds a fixed ready state urged in a direction close to each other.
By attaching the mounting portion to the external fixing member and removing the holding piece after passing the external rod-shaped member through the annular portion in the fixing ready state, both the tightening portions are close to each other and the annular portion. Is reduced in diameter, and the rod-shaped member is fastened with an annular portion to be fixed to the fixing member. The fixing tool for a rod-shaped member according to claim 1, wherein the mounting portion is attached to the fixing member in the fixing ready state. The fixing tool for a rod-shaped member according to claim 1 or 2, wherein the holding piece is integrally formed with both tightening portions in a state where it can be separated from both tightening portions. The fixing tool for a rod-shaped member according to claim 3, wherein at least both the tightening portions and the holding piece are made of resin. The fixing tool for a rod-shaped member according to any one of claims 1 to 4, wherein the fixing member is a support column erected in a corridor, and the rod-shaped member is a handrail. A fixing structure for a rod-shaped member in which the rod-shaped member is fixed to the fixing member by using the fixing tool for the rod-shaped member according to any one of claims 1 to 5.

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